Improvement in harrows



fof Iowa, have invented certain new `and useful I mf `each of the figures.

l posed of two sections, A'and B, each of4 which con.-

4distant from each other, and secured together by' means of four crossbars,-D, arranged parallel with to said bars C.

, to conform to the shape of the bars O and D, while` AUGUST FRIEDEMANN, or WAvnRLr,IoWA.

` Letters Patent No. A106,()

46, dated August-2, 1870.

lrzvrracvmvrf.'NT VIN HaRRoWs.

The Schedulereferre; to in these Letters Patent and making part of the-same.

To all inkom' it may concern Be it known that I, AUGUSTFRIEDEMAN, of Waverly, in the county lof Bremer andin the State provements" in Harrows*,an`d do'hereby declare tl'at the following is a full, clear, and exact description thereof, reference beingr had to the acompauyingdrawl ing makinga part of this specification, in which- AFigure l is a plan view ofthe upper side of my dey vice, and e y l Figure 2 is a front elevation of the same, with thev draft-bar removed.

Letters of like name and kind refer to like parts in My 'invention is animprovelnent -in the construction, attachment, and draft of hinged or flexible harrows; and i It consists principally in the peculiar construction of th'e" rear hinge for connectingthe sections, by means of which a relatively Vradial and a vertical movement of the saidV sections is secured, as is hereinafterset forth.

It further consists in thetripple attachment ofthe draft-bar, substantially as and for the purpose hereinafter shown. i

l `In the annexed drawing is shown aharrow,`com

sists of three bars, G, arranged parallel withand equieach other, and at anV angle of about thirty degrees The front ends of the Asections A and B arey piv# ote'd" together by means of` an ordinary strap-hinge, E, the leaves of which are curved 'to` the rear, so as the rear ends of said sections are connectedby means of a' strap, F, having its vends pivoted to or upon two studs, G, secured to and projecting rearward 'fi-om the inner ends of ther-ear cross-bar G.

As seen in iig... the strap F springs -upward in the form of a pointed arch, and has secured toor within its s apex two hooks, f, Ato each of which is attached one end of a short chain, H, having its opposite end connected to the rear cross-bar by means of a staple, h. The object of the chains is tofhold the arched clamp `in place, and prevent it from' moving too far to either side. A straight strap, I, -provided with suitable openings at its ends, is placed over4 the studs G, and receives all lateral strain that would otherwise come upon the arched clamp.

' As thus connected, the rear ends ofthe sections ily to the uudulations or inequalities of the ground,

and much increases the efficiency of the barrow.

The' teeth K, of usual form, are inserted within the cross-bars D, and within the inner bars C, and

are so arranged with reference to each other as that no two shall come in the same line of draft, by which means the fnrrows marked are equidistant from and parallel Ywitheach other.

The draft-bar L is connected to the harrow by means of a chain, M, attached to. either end of said bar and to a plate, N, secured to or 4upon the front edgeof each section, said plates being provided with a seriesof holes, n,lwhicb permit said chains to be Vconnected at a greater orlesser distance from the center of the barrow. v l

A third chain, O, attached to the draft-bar L at its center, and connected to a hook, P, secured and projecting forward from the inner edge ol' one of the sections, furnishes a -means whereby the draft is transferred from the plates N to the center of the barrow,

whenever.l said sections are raised, by which means The especi l advantages claimed for this device are,

thoroughness and efficiency of operation, together with ease and uniformity ofA-draft.

Having thus fully set `forth the nature and merits of my invention, l

What I claim as new, and desire to secure by Letters Patent, is' e The means employed for connecting together and rendering relatively adjustable the rear ends of the sectiops A and B, consisting of the arched and straight straps F and I, pivoted to or upon the studs G, substant-ially as shown and described.

Also, in combination with the sectionsvA -and B, the straps F and I, and the studs G, the check-chains H, substantiallyA as shown, and for the purpose speci-v tied;

H. S. Hoovnu, t E. E. Hoovnn.-

Also, the means employed for connecting the drat'lbar L to the barrow, consisting of the chains M and 

